Wear-compensating device



April 21,1925.

O. J. DORSEY WEAR COMPENSATING DEVICE 2 Sheets-Sheet 1 Filed 0G11, 18, 1921 April 2'1, 1925.

O. J. DORSEY WEAR COMPENSATING DEVICEl Filed Oct. 18, 1921 2 Sheets-Sheet 2 lthatcriteri pr. 2i, 1925.

. STATES Fil" OTHO J'. DGR-SEY, OF PHILADELPHIA, PENNSYLVANIA.

WEAR-COMPENSATING DEVICE.

Application filed October 18, 1921.

VVear-Compensating Devices, of which the following is a specification.

It is well known that the bearings for crank pins on connecting rods of engines soon wear owing to the powerful action of the connecting rods and that this wear soon causes a looseness of the connection which if not immediately attended to causes u pounding and injury to the parts.

One object of my invention is to provide improved means which will automatically compensate for wear between the bearing of a connecting rod or pitman and the crank p pin or shaft to which 1t 1s attached.

Another object is to make the `device of my invention of a practical, simple and durable construction.

lThese objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in whichl Figure 1 is a side elevation of a structure made in accordance with my invention,

Figure 2 is an inverted plan view of Figure 1, f

Figure 3 is a section taken on the line 3-3 of Figure 2,

Figure l is a section taken on the line 4l`4 of Figure 3,

Figure 5 is an enlarged section taken on the line 5-5 of Figure 2,

Figure 6 is a perspective view of the wedge block, Figure 7 racl plate,

Figure 8 isV a spring shoe, and

Figure 9 is a fragmentary section showing a slight modification of certain of the parts. 1 Referring to the drawings, connecting rod or cated at its end;

is a perspective view of the perspective view of the 6 represents a pitman which is bifurthe furcations 7 and 8 being spaced apart to provide room forl bearing blocks 9 and 1 0; said bearing blocks having concavities providing a bearing for a crank pin or shaft 11. rlhis crank pin or shaft may be on any movable element, such for example as on a crank arm- .27 being cut through the teeth Serial No. 508,594.

A filler block 12 is positioned between the furcations 7 and 8 and forms an abut` ment for the bearing block 10. A bolt lf3 vor other suitable securing device extends through the furcations and filler block and serves to hold the parts together.

The bearing block 9 at its end opposed to the block includes a cavity 14, the inner surface 15 of which slants upward with respect to the inner vertical surface 16 of the body portion 17 of the connecting rod. A toothed rack plate 18 is mounted within the cavity 111 and be- -tween this plate 18 andthe surface 15 is preferably positioned a liner plate 19 for a purpose hereinafter described. The teeth of the rack plate 18 includes surfaces 2O which are approximately parallel with the surface 16; the line of the teeth taking the slant of the surface 15. A wedge block 21 has a surface 22 coincident with the surface 16 of the connectingrod. The portion of the wedge block 21 opposed to the surface 22 is provided with teeth 23 adapted to mesh with the teeth of the rack plate 18. It will be noted that there are less teeth on the wedge block than on the rack plate 1.8 and under certain conditions hereinafter described the wedge block can be moved so as to cause its teeth to engage other teeth of the rack plate from those which it en gages as shown in Figure 3. rlhe rack plate. 18 has a groove 24 which cuts through the teeth of the rack plate within their width so as to provide a smooth surface 25 for engagement by a looped spring shoe 26 which is secured wit-hin a recess 27 in the wedge block 21; said recess 23 within their width. rlhe kends of the looped spring shoe are secured within the recess 27 and the spring shoe tends to move the bearing block 9 toward the crank pin or shaft 11. The wedge block 21 has a bore 28 entending partway therethrough; said bore leading upward from the lower surface of the wedge block. A coiled spring 29 has a poi'- tion fitting within the bore 28. A securing member 30 illustrated in the form of a bolt extends through the furcttions 7 and 8 and through the wedge or block 21 at position so as to pass through the bore 28. A; follower bushing 31 is screwed on the bolt 30 and has a portion 32 adapted to engage the lower surface of the connecting rod. The spring 29 surrounds the bus-hing lll) and engages the portion 32 thereof. If desired a pin 33 can extend through the bushing and bolt to lock the bushing thereto and it will be noted that the spring Q9 tends to move the wedge blockZl upward. Thel bearing blocks 9 and 1() have side flanges 311 which embrace the side surfaces of the furcations 7 and 8 and tend to prevent lateral movement of the bearing blocks within the space between the urcations.

frTheaction of theV device is as follows: When any slight. wear occurs between the crank pin or shaft 11 and the block 9, the `spring shoe tends to convey the block 9 against the crank pin. When wear occurs to the extentof the depth of the teeth, then the springQS) will act to move thewedge block 21, upward andcause the teethV thereon to engage other which arenearer the` surface 1G. manner, thewear is `compensated 'foruntil the .wedge bloclthasreached its eXtreme upward limit. Them place th'eblocki with a new one, theliner 191 can be removed and axthicker' liner in.

serted between the raclrf plate and the snr'- face 15T ot the bearing block). By provid; ing the groovev 24 in the rack plate the spring shoe will have a smooth guideway in which` to operate, Furthermore the cavity 14 serves as a guideway for a portion of the wedge block andthe bolt 30 and surface 16 serves as additional means to prevent lateral movement. of the wedge block.

In the. form. of my invention shown in Figure 9 the construction is. substantially similar to that described with exception that the Vfollowers sleeve can` be moved. upward..

through thejhole. in the lower urcation Vso asto compress ther spring 29 to` various ex tents; thus making the. spring strongenor weakerV in its .action upon the wedgeblock.

It" it is necessary to. change the bearing bloclt10 the samecanbe done by removing the filler block 12 and inserting a new block 10.

While have described my invention as taking a particular form, it will be understood that the various parts of my. invention may be changed without departing :tromV the spirit thereof, and hence l donot limit myself to the precise constructionzset forth, but consider that I am atlibertyto make such changes and alterations as fairly come within the scope. of the appended claims. Y

Having thus describedmy invention, what I'claiinas new anddesire tofsecure byv Letters Patent is 1. i device ot the character described influding a shaft bearing having a movable sect-ien 1with an inclined tace; a block havingv an inclined tace having teeth thereon and a groove intersecting the teeth; a plate,

having teeth and a groove intersecting the teeth on the rack. plate In .this

ifV it. is not. desired to. re-

cluding aJ connecting rod providing a bearing for a shaft, saidr bearing including amovable. section; a wedge block having teeth thereon; means providingV teeth between the teeth of said block and said member; and means for automatically moving vsaid block ton cause` its teeth to` engage others of said second mentioned` teeth when, wear occurs at said bearing, the teethA of. said block` and. the other.,

teeth. being arranged, in rows.Y extending; at v a slant to` thalength` ofsaid."eonnecting..rod,v

said.: teeth,V having Vabutting surfaces; al);

proximately at right'. angles* toA ,y the lengthl` substantiallyA as?l ot said c0111.lecting'l rod; described.

'3. A device ot the character described. in`

cluding. a connecting -rod` providin La. bearf` uding a` block having teeth.

ing, for a shaft, saidA bearing inc movable section; a wedge thereon; means providing `teethbetween the teeth of said block and sai'dmember; means for automatically inovingsaidblock` to cause its teeth to,l engage others of. said second mentioned .teeth` when `wear occurs at` said v bearing, the teeth. of saidtblock andthe other: teeth being- .arranged .in rows. extendf ing at a slant to the length of said connecting rod.;and a. spring interposed;` between the wedge block and.,` fsaidlbearing i member for. exerting apressnre-uponsaid bcarin member in the direction of the length of said` connecting rod.; substantially as described.

4. A device ofthe character describedincluding a-:connecting rod havinga bifurcated end with the urcations spaced apart; a bearing positioned between saidl,` urcations and including a movable part; block between said movable part andthe inner surface of the bifurcated end, said bearing block having a cavity; a Vsprinflr having a portion within said cavity; an means connected tosaid connecting rod'. for holding said spring at wedge blockto itake up for any weary occurring` at the bearing; substantially as described.

5. A device cluding a connecting rod having a bifur cated end with the furcations spaced apart; furcations and including a movable part; a` wedge block between saidmov-ablepart and the inner surface of the `biturcated end, said bearing block having a` cavity; a springA having a portion within said cavity; and

av wedge a position to permit said springto move said a bearing positioned between sai-l` of the character described `inmeans connected to said connecting rod for holding said spring at a position to permit said spring to move said Wedge block to take up for any Wear occurring at the bearing, said connecting means including a bolt and a bushing in screw threaded connection With said bolt; substantially as described.

6. A bearing comprising a U-shaped frame, a bearing block movable in the frame and having a longitudinally inclined shoulder having serrations thereon, a longitudinally movable Wedge having a tapered surface extending parallel to the inclined surface on the lower bearing also provided with serrations engaging the first mentioned 15 serrations, resilient means urging the Wedge longitudinally, and resilient means urging the bearing block vertically.

In testimony whereof I have signed my name to this specification in the presence 20 of two subscribing' Witnesses.

OTH() J. DORSEY.

Titnesses ELIZABETH GARBE, CHAs. E, PoTTs. 

